Feed-water heater.



NI. L. DUNNAM.

FEED WATER HEATER. APPLrcATIoN man Au s.15.ls\a.

l ,287,922. Patented Dee. 17, 1918.

2 SHEETS-SHEET I.

M. L. DUNN/xm.

FEED WATER HEATER. f

APPLICATWN HLED AUG.15| l9l8. 1,287,922. Patented Dec. 1T, 1918.

2 SHEETS-SHEET 2.

'wil

MARTIN LUTHER DUNNAM, 0l" MERIDIAN, MISSISSIPPI.

FEED-WATER HEATER.

Application led August 15, 1918.

To all whom t may concern:

Be it known that I, MARTIN L. DUNNAM, a citizen of the United States,residing at Meridian, in the county of Lauderdale and State ofMississippi, have invented certain new and useful Improvements inFeed-Tater Heaters, of which the followingy is a specitication.

This invention relates to combined condensers and feed-water heaters ofthe type shown in Letters-Patent No. 1,076.410, granted to me October21, 1913, and has for its object the provision of simple and etlicientmeans-whereby the water will be thoroughly heated before entering thecondenser and also to improve the construction of the condensingchamber.

The invention is illustrated in the accompanying drawings, in which-Figure l is a vertical longitudinal section of an apparatus embodying mypresent improvements g Fig. 2 is a horizontal section on the line 2-2 ofFig'. 1;

Fig. 3 is an end elevation;

Fig. 4c is a transverse vertical section.

In carrying out my invention, I employ a casing which is substantiallyinverted U- shape in cross-section. In forming the casing, I take a.rectangular blank of sheet metal or other suitable material and doublethe same upon itself longitudinally so that when` set up on its sideedges it will present an arched top 1 and vertical sides 2. The loweredges of this outer casing wall may be connected by a bottom plate 3 andthe ends are closed by headers, indicated at 4 and 5. Above the bottomplate 8, I provide a partition consisting of a series of troughs orflues 6 extending from end to end of the casing in parallel relation andhaving their sides integrally or otherwise intimately connected, asshown at 7, thereby providing` a series of alternating troughs tocontain the water admitted into the condenser, as shown at 8, and titlesor passages 9 through which the heat for raising the temperature of thewater may pass. Heat from the boiler furnace may be admitted into thespace between the bottom 8 and the partition 6 or a grate 10 may beprovided at the front end of said space, as illustrated. In eitherevent, a flue 11 will be provided at the back of the casing to carry thewaste heat ott' to any point of discharge. Upon the front header will bepro- Specication of Letters Patent.

-the lower edges of all the plates.

Patented Dec. 17, 1918.

Serial No. 250,010.

plurality of air tubes 14 which extend from f end to end of the casingand have their ends opening through the respective headers 4 and 5, asshown. These air pipes are arranged in arcuate rows, as shown mostclearly in Fig. 4, and below each row is disposed a drip plate 15 whichcatches the drip from'the water condensing upon these tubes or Apipesand directs the same into troughs 16 arranged on the sides of the casingin position to catch the discharge from A feed pipe 17 is arranged in atortuous path eX- tending through the several iues 9 and eX- t-endinglongitudinally of -the said lues. The sections of the pipe are connectedalternately at the front and rear of the condenser by branches 18, asshown most clearly in F 1g. 2 and the discharge end of the pipe iscarried inwardly through the front header 55 and preferably equippedwith a spout 19 lwhereby the water is deposited in the adj acent trough8. rllhe iow through the feed pipe should be so regulated that the levelof the water in the condenser will remain approximately constant just ator below the bottoms of the troughs 16. From the front ends of thetroughs 16, pipes 2O extend to a pump (not shown) which operates to drawthe water from the troughs and force it to the boiler or gang ofboilers.

From the foregoing description, taken in connection with theaccompanying drawings, it will be readily seen that the water, whichmust flow through the feed pipe 17 before entering the condenser, isexposed to the direct action of the tire upon the grate 10 or the heatedcurrents fed t0 the heat chamber from the boiler furnace and the escapeof the heated currents through the flue 11 will create a draft throughthe pipes or tubes 18 which will draw cool air constantly therethrough.As the water enters the condenser in a heated state it will be readilyvaporized within the condenser and the vapor will, of course, rise toand circulate between .the several drip plates and condensing tubes andwill be recondensedby contact with said tubes so that the puriiied waterwill drip onto the drip plates and be directed thereby into the troughsi6 from which it will be drawn and fed to the boiler by the feed pumpsas stated. rlhe corrugated formation of the partition 6 whichconstitutes the bottoni of the Condensing chamber and also the roof ofthe heating chamber provides an extended heating surface in directContact with the water in the condenser so that the vaporizing 0perationwill be efficient and continuously performed. The inverted U-sliape'd'orino'f the casing permits the same to be ver;7 eX- peditiously andeconomically manufactured so that the cost of installing the condenserin existing` plants as -Well as .in plants to be built Will beminimized. The iorni4 of the casing, furthermore, provides a Widersnpport for a condenser chamber' of a given diameter than formsheretofore employed.

Having thus described my' invention, what is claimed as newr is:

A feed-Water heater and condenser coni- .prising an inverted tit-shapedcasing ineluding; straight vertical sides and an' arched Jeinigten inse'rgoaa top7 a partition secured at its side edges to the straight4vertical sides of the casing, said partition being* constructed withlongitudinal corrugations forming troughs and tiues, a header closingthe front end of the casinga second header closing the rear end of thecasing and having its loWer'end lconstructed to leave the space belowthe partition and the rear ends of the fines in the partition Open, aniescape iiu'e at the yrear end of the easingv in communication with: thelines in the partition and the space below' the partition, a feed pipepassing tortuously throng-'h the several .lues' and haring. oneendcarried inwardly `through the header atv the iront end of the casing andprovided with' a spout discharging into one of the troughs,

`means in the upper portion of the casing for condensing the vaporrising from 'the troughs, and means for drawing off the condensedTfapor. v A,

lin testimony whereof l my signature.

mirent torete oceania. [n er addressnr .Gosi'rnisscner ci Patente,

